<?php

if (!defined('BASEPATH'))
  exit('No direct script access allowed');
/**
 * CodeIgniter
 *
 * An open source application development framework for PHP 5.1.6 or newer
 *
 * @package		CodeIgniter
 * @author		ExpressionEngine Dev Team
 * @copyright	Copyright (c) 2008 - 2011, EllisLab, Inc.
 * @license		http://codeigniter.com/user_guide/license.html
 * @link		http://codeigniter.com
 * @since		Version 1.0
 * @filesource
 */
// ------------------------------------------------------------------------

/**
 * CodeIgniter String Helpers
 *
 * @package		CodeIgniter
 * @subpackage	Helpers
 * @category	Helpers
 * @author		ExpressionEngine Dev Team
 * @link		http://codeigniter.com/user_guide/helpers/string_helper.html
 */
// ------------------------------------------------------------------------

/**
 * Trim Slashes
 *
 * Removes any leading/trailing slashes from a string:
 *
 * /this/that/theother/
 *
 * becomes:
 *
 * this/that/theother
 *
 * @access	public
 * @param	string
 * @return	string
 */
if (!function_exists('trim_slashes')) {

  function trim_slashes($str) {
    return trim($str, '/');
  }

}

// ------------------------------------------------------------------------

/**
 * Strip Slashes
 *
 * Removes slashes contained in a string or in an array
 *
 * @access	public
 * @param	mixed	string or array
 * @return	mixed	string or array
 */
if (!function_exists('strip_slashes')) {

  function strip_slashes($str) {
    if (is_array($str)) {
      foreach ($str as $key => $val) {
        $str[$key] = strip_slashes($val);
      }
    } else {
      $str = stripslashes($str);
    }

    return $str;
  }

}

// ------------------------------------------------------------------------

/**
 * Strip Quotes
 *
 * Removes single and double quotes from a string
 *
 * @access	public
 * @param	string
 * @return	string
 */
if (!function_exists('strip_quotes')) {

  function strip_quotes($str) {
    return str_replace(array('"', "'"), '', $str);
  }

}

// ------------------------------------------------------------------------

/**
 * Quotes to Entities
 *
 * Converts single and double quotes to entities
 *
 * @access	public
 * @param	string
 * @return	string
 */
if (!function_exists('quotes_to_entities')) {

  function quotes_to_entities($str) {
    return str_replace(array("\'", "\"", "'", '"'), array("&#39;", "&quot;", "&#39;", "&quot;"), $str);
  }

}

// ------------------------------------------------------------------------

/**
 * Reduce Double Slashes
 *
 * Converts double slashes in a string to a single slash,
 * except those found in http://
 *
 * http://www.some-site.com//index.php
 *
 * becomes:
 *
 * http://www.some-site.com/index.php
 *
 * @access	public
 * @param	string
 * @return	string
 */
if (!function_exists('reduce_double_slashes')) {

  function reduce_double_slashes($str) {
    return preg_replace("#(^|[^:])//+#", "\\1/", $str);
  }

}

// ------------------------------------------------------------------------

/**
 * Reduce Multiples
 *
 * Reduces multiple instances of a particular character.  Example:
 *
 * Fred, Bill,, Joe, Jimmy
 *
 * becomes:
 *
 * Fred, Bill, Joe, Jimmy
 *
 * @access	public
 * @param	string
 * @param	string	the character you wish to reduce
 * @param	bool	TRUE/FALSE - whether to trim the character from the beginning/end
 * @return	string
 */
if (!function_exists('reduce_multiples')) {

  function reduce_multiples($str, $character = ',', $trim = FALSE) {
    $str = preg_replace('#' . preg_quote($character, '#') . '{2,}#', $character, $str);

    if ($trim === TRUE) {
      $str = trim($str, $character);
    }

    return $str;
  }

}

// ------------------------------------------------------------------------

/**
 * Create a Random String
 *
 * Useful for generating passwords or hashes.
 *
 * @access	public
 * @param	string	type of random string.  basic, alpha, alunum, numeric, nozero, unique, md5, encrypt and sha1
 * @param	integer	number of characters
 * @return	string
 */
if (!function_exists('random_string')) {

  function random_string($type = 'alnum', $len = 8) {
    switch ($type) {
      case 'basic' : return mt_rand();
        break;
      case 'alnum' :
      case 'numeric' :
      case 'nozero' :
      case 'alpha' :

        switch ($type) {
          case 'alpha' : $pool = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
            break;
          case 'alnum' : $pool = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
            break;
          case 'numeric' : $pool = '0123456789';
            break;
          case 'nozero' : $pool = '123456789';
            break;
        }

        $str = '';
        for ($i = 0; $i < $len; $i++) {
          $str .= substr($pool, mt_rand(0, strlen($pool) - 1), 1);
        }
        return $str;
        break;
      case 'unique' :
      case 'md5' :

        return md5(uniqid(mt_rand()));
        break;
      case 'encrypt' :
      case 'sha1' :

        $CI = & get_instance();
        $CI->load->helper('security');

        return do_hash(uniqid(mt_rand(), TRUE), 'sha1');
        break;
    }
  }

}

// ------------------------------------------------------------------------

/**
 * Add's _1 to a string or increment the ending number to allow _2, _3, etc
 *
 * @param   string  $str  required
 * @param   string  $separator  What should the duplicate number be appended with
 * @param   string  $first  Which number should be used for the first dupe increment
 * @return  string
 */
function increment_string($str, $separator = '_', $first = 1) {
  preg_match('/(.+)' . $separator . '([0-9]+)$/', $str, $match);

  return isset($match[2]) ? $match[1] . $separator . ($match[2] + 1) : $str . $separator . $first;
}

// ------------------------------------------------------------------------

/**
 * Alternator
 *
 * Allows strings to be alternated.  See docs...
 *
 * @access	public
 * @param	string (as many parameters as needed)
 * @return	string
 */
if (!function_exists('alternator')) {

  function alternator() {
    static $i;

    if (func_num_args() == 0) {
      $i = 0;
      return '';
    }
    $args = func_get_args();
    return $args[($i++ % count($args))];
  }

}

// ------------------------------------------------------------------------

/**
 * Repeater function
 *
 * @access	public
 * @param	string
 * @param	integer	number of repeats
 * @return	string
 */
if (!function_exists('repeater')) {

  function repeater($data, $num = 1) {
    return (($num > 0) ? str_repeat($data, $num) : '');
  }

}


/* End of file string_helper.php */
/* Location: ./system/helpers/string_helper.php */